The universal travel power plug adapter should be used all-in-one adapter. The adapter is with 2-flat-pin / 2-round-pin / 3-flat-pin plug to be suitable for Europe / England / USA / China / Japan / Australia plugs and other countries with same standard. This adapter is also with USB adapter to charge your USB devices directly. With one universal adapter, you can use it to charge devices as you are travelling all over the world.